Printing-machine



(No Model.)

W. S O O T T.

PRINTING MACHINE.

2 SheetsSheet l.

Patented Feb. 17, 1885.

N. PETERS. Phuwunw m nev. WJshmgln. Dv c.

W. SCOTT.

PRINTING MACHINE.

No. 312,389. Patentgd Feb. 17, 1885.

I (No Model.) 2 Sheets-Sheet 2. P

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lVAL ER SCOTT, OF PLAINFIELD, NFAV JilRSllY.

PRINTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 312,389, dated February 17, 1885.

Application filed January 21, 188-1. (No model.)

To [0% whom it may concern.-

Be it known that I, WALTER Soo'r'r, ofPl-ainfield, in the county of Union and State of New Jersey, have invented an- Improvement in Printing-lllachines, of which the following is a specification.

This invention relates to printing-presses in which the sheet to be printed is taken by the grippers upon the imp cssion-cylinder and delivered in frontijoil a tly, and laid down upon a table. In presses of this character the freshly-printed surface is often blurred by passing down in contact with the deliverytapes, and being caught by the fly coming into contact with the printed surface and arresting the sheet in its endwise movement and carrying it down upon the delivery-table. By myimprovement the sheet is moved away from the tapes and reversed, so that it hangs down with the freshly -printed surface away from the fly, and hence the same does not become blurred, because the fly comes in contact with the hack of such sheet.

In the drawings, Figure .1 is an elevation of part of a printing-press. Fig. 2 is a partial plan of the same, and Fig. 3 is a diagram showing tapes around the impression and transfer cylinders.

The frame A, l'eedboa-rd B, impression-cylinder G, transfer-cylinder I), fly E, deliverytable F, cam G, lever ii, and rod and crank to the fly are all of any prdiuary or desired construction. The type-bed and types are not represented. The gri p pe s a are upon a crossshaft, as usual, and they are opened and closed by the segment I) acting upon the pinion c, and there is a stationary earn, it, to open the grippers by acting upon theroiler e and turning the segment Z).

In order to close the grippers the spring f is employed, the same acting at its end against a toe at the side of the segment I). The back end of the spring f is attached to the stock which is pivoted at i to the end of the cylinder, and there is a set-screw, Ir, beneath the stock to adjust the same, and thereby regulate the pressure of the spring on the seg ment b, and I make use of a screw-stop, Z, beneath the segment I), to determine the position of the same when the grippers are closed.

This screw-stop prevents the entire pressure of the springf being transferred to the gripper-lingers, and provides for the parts being adjusted so that the gripper-fingers press upon and hold the sheet with the desired force, and

may be tapes 1' around this transler-cylinder to the pulleys 1-, near the axis of the tly as usual, butthey are not necessary. I have shown the transtor-cylinder as composed ola range of pulleys. There is a shaft, in bear ings q, upon the Frame A, and to this shalt an irregular oscillating or partial rotary motion is given by the slide-rack Ii, supportedbythe roller 1., and receiving motion from the cum 1% upon the shalt U. This cam is shaped in about the form represented, in order that the motions hereinafter described maybe given to the shaft 2 and to the gripper." T, that-are carried by said shaft. There are any desired number of gripperdingers T, and the shaft tfor the same is supported either in end heads, 1, or arms, and there is a bar across from one end head to the other for the gripper-fingers to close against, and the distance between the heads P should be greater than the width of the sheet, and the heads should be weighted on the sides opposite to the grippers to counterlnilauce the same. The cam 12 is stationary and acts upon the wrist of the gripper-shaft to open the grippers,

the sheet and carry it up over the transfer-cylinder, the impressed side being upon the cylinder, or the tapes that surround the same,- and then as the grippers reach the point of delivery the grippers T are in position ready to receive the advancing edge of such sheet, the

cam Ithaving brought such grippers to their place at the proper time and commenced to move them back, so that the grippers T are moving and close as the sheet runs into them. At the same instant the grippers m are opened, and the grippers T move back nearly as fast as the sheet is moving, and then move slowly, so that the sheet as delivered from the transfer-cylinder hangs down in a loop in front of the fly E,which latter has been raised, as usual "before the advan eing end of the sheet reaches its upper end. As soon as the rear end of the sheet is liberated from between the transfercylindcr and the pulleys or disks M the said end of the sheet drops and the sheet hangs vertically,ornea-rly so, with its freshly-printed surface away from the fly-frame, which latter now commences to move and comes up to the hanging sheet at the moment that the grippers T are liberated; hence the fly-frame takes the sheet and lays it down upon the table F and returns to its normal position, as shown by dotted lines in Fig. 1. By this means the blurring of the sheet by the contact of the freshly-printed surface with the fly is prevented.

In some kinds of presses there are tapes or belts around the impression-cylinder G and passing up over the transfer-cylinder D around pulleys at M, and back to the top of the impression-cylinder G, as illustrated in the diagram, Fig. 3. In this character of press the grippers m are not required. It is also well known that atmospheric suction is sometimes. used in place of grippers in printing-presses. It is therefore to be understood that I do not limit myself in these particulars. The grippers T, or equivalent devices that grasp the advancing end of the sheet and hold the same up as the other portion of the sheet passes on and hangs down, may be moved horizontally, or nearly so,instead of swinging in the are of a circle, the operations of the parts being unchanged.

The grippers T and the heads earryingthe same may be rotated completely instead of being oscillated. In this case the rotary movement should be slower when receiving and holding the sheet than it is when the grippers are being carried over into position for receiving the next sheet. V

I claim as my invention 1. The conrlbination, with the impressioncylinder and its grippers, of a segment, b, and pinion c, a spring, j, having a pivoted stock,

g, and a set-screw, it, to regulate the force with which the spring acts in closing the grippers, substantially as set forth.

2. In combination with the gripper-shaft and grippers, the springf, segment b,andpinion for closing the grippers,and the adjustingscrews and Z, to regulate the pressure of the grippers upon the paper, substantially as set forth.

3. The combination, with the fly-frameand the sheet-delivering frame or cylinder,of grippers that are independent of the fly-frame and seize the advancing end of the paper, substantially as specified, the sliding rack, pinion, cam, and roller for moving such grippers and for opening the same alter the sheet assumes a hanging position in front of the flyframe, substantially as and for the purposesset fort-h.

I. In combination with the impression and delivering cylinders and the fly in a printingpress, grippers, and mechanism for moving the same, substantially as specified, whereby the sheet is grasped by the advancing end and held reversed, suspended, and then dropped in front of the fly-frame, substantially as set forth.

Signed by me this 19th day of January, A. D. 1884.

\VALTER SCOTT.

\Vitne'sses:

WILLIAM G. Mo'r'r, CHAS. H. SMITH. 

